.plus-common(@size, @thick, @color: @line-color) {
  position: relative;
  color: @color;

  &::before {
    width: @size;
    height: @thick;
  }

  &::after {
    width: @thick;
    height: @size;
  }

  &::before,
  &::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    margin: auto;
    background-color: currentColor;
    content: '';
  }
}
